A new year, a new teacher, and a very mysterious house guest

Clementine Rose is heading back to school, and this year she has a new teacher. Young Mr. Smee is very different from Mrs. Bottomley, and he sets the class a special project. Clemmie can't wait to get started! Meanwhile at Penberthy House, an intriguing guest has just arrived. Miss Richardson is staying for a whole month to write a book. Trouble is, she never comes out of her room and doesn't seem to like children at all. Will Clementine discover who their elderly resident is, and why she is so secretive?